JP2017012674A - Wearable sensor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wearable sensor device excellent in durability.SOLUTION: A wearable sensor device comprises: an elastic substrate 2; a sensor part 3 provided on the substrate 2 and including a plurality of kinds of sensors (electronic components) 3a-3d; a power source part 4 including a battery (an electronic component) 4a provided on the substrate 2, and the like; a communication part 5 including an RFIC (an electronic component) 5b, a CPU (an electronic component) 5c, an antenna (an electronic component) 5d, and the like; a wire 6a having elasticity and properly connecting the electronic components of the sensor part 3 and the electronic components of the power source part 4 to each other; and a wire 6b having elasticity and properly connecting the electric components of the sensor part 3 and the electronic components of the communication part 5 to each other.SELECTED DRAWING: Figure 2

Description

  The present disclosure relates to a wearable sensor device that can be attached to a living body such as a human body or a structure such as a machine.

In recent years, wearable sensor devices such as biocompatible sensor devices that are attached to a living body such as a human skin and detect living body information such as an electrocardiogram of the living body and information on the surrounding environment such as ambient temperature and pressure of the living body. It has been put into practical use.
As biocompatible sensor devices as described above, various biocompatible sensor devices have been proposed in Patent Documents 1 to 3. Patent Document 1 discloses a first polymer layer that is attached to human skin, a second polymer layer that is laminated on the first polymer layer, and three electrodes that are provided on the surface of the first polymer layer. And a data acquisition module as a sensor provided on the surface of the second polymer layer, and wiring for connecting each of the three electrodes and the data acquisition module, dimethylvinyl-terminated dimethylsiloxane (DSDT) and tetramethyltetra A biocompatible polymer substrate having a first polymer layer formed by PDMS obtained by polymerizing vinylcyclotetrasiloxane (TTC) at a ratio of 100: 2 to 73: 1 is disclosed.

  Patent Document 2 discloses a first polymer layer that is attached to human skin, a second polymer layer laminated on the first polymer layer, and three layers provided on the surface of the first polymer layer. A data acquisition module as a sensor provided on the surface of the second polymer layer, and wiring for connecting each of the three electrodes and the data acquisition module, and dimethylvinyl-terminated dimethylsiloxane (DSDT) and tetra The first polymer layer is formed by PDMS obtained by polymerizing methyltetravinylcyclotetrasiloxane (TTC) at a ratio of 100: 2 to 73: 1, and dimethylvinyl-terminated dimethylsiloxane (DSDT) and tetramethyltetra By PDMS polymerized with vinylcyclotetrasiloxane (TTC) at a ratio of 10: 1 to 9: 2, It discloses biocompatible polymer substrate that constitutes the polymer layer.

  Patent Document 3 discloses a substrate made of a flexible resin such as PDMS, a pair of wirings provided on the surface of the substrate, and a part of the pair of wirings formed on the substrate. A biocompatible polymer sensor comprising a piezoelectric member as a sensor and a film-like member provided so as to cover the piezoelectric member is disclosed.

JP 2012-10978 A JP 2012-139306 A JP 2012-141186 A

  In these conventional biocompatible sensor devices (wearable sensor devices), since the wiring is formed using a conductive layer such as a metal or an alloy, the shape of the body to be worn, the size of the biocompatible sensor device, etc. Depending on the case, the wiring may be separated from electronic components such as electrodes and sensors to be connected, or the wiring itself may be disconnected. That is, the conventional biocompatible sensor device may cause a problem that durability is lowered due to an abnormality in wiring.

  Therefore, the present disclosure provides a wearable sensor device having excellent durability.

  The present disclosure relates to a wearable sensor device including a base material having elasticity, two or more electronic components provided on the base material, and wiring having elasticity and connecting the two or more electronic parts. About.

  According to the present disclosure, in one or a plurality of embodiments, a wearable sensor device having excellent durability can be provided.

FIG. 1 is a schematic cross-sectional view illustrating an example of a biocompatible sensor device according to the present disclosure. FIG. 2 is a plan view for explaining a specific configuration example of the biocompatible sensor device shown in FIG.

  In view of the above problems, in one aspect, the present disclosure provides a wearable sensor device having excellent durability.

A wearable sensor device excellent in durability according to an embodiment of the present disclosure includes a base material having stretchability;
Two or more electronic components provided on the substrate;
It has elasticity and has wiring for connecting the two or more electronic components.

  In the wearable sensor device, two or more electronic components are provided on a stretchable base material. Moreover, these two or more electronic components are connected by the wiring which has a stretching property. Thereby, unlike the said prior art example, the wearable sensor device excellent in durability can be comprised.

  In the wearable sensor device, the two or more electronic components may include a sensor that acquires predetermined information.

  In this case, predetermined information can be acquired by the sensor.

  In the wearable sensor device, the sensor may include a biological sensor that acquires information related to a living body.

  In this case, information related to the living body can be acquired by the living body sensor.

  In the wearable sensor device, it is preferable that silicone rubber is used for the base material.

  In this case, a substrate having excellent durability can be formed, and a wearable sensor device having excellent durability can be easily formed.

  The silicone rubber preferably has a tear strength of 40 N / mm or more.

  In this case, it is possible to easily construct a base material having excellent stretchability and improved durability.

  In the wearable sensor device, it is preferable that a composite of silicone rubber and a conductive material is used for the wiring.

  In this case, a wiring having excellent durability can be configured, and a wearable sensor device having excellent durability can be easily configured.

  Moreover, the silicone rubber-based curable composition according to an embodiment of the present disclosure includes a vinyl group-containing linear organopolysiloxane (A), an organohydrogenpolysiloxane (B), silica particles (C), A silicone rubber-based curable composition for use in the production of any of the wearable sensor devices described above, comprising a silane coupling agent (D) and platinum or a platinum compound (E).

  The silicone rubber-based curable composition configured as described above includes a vinyl group-containing linear organopolysiloxane (A), an organohydrogenpolysiloxane (B), silica particles (C), and a silane coupling. Since the agent (D) and platinum or the platinum compound (E) are contained, a wearable sensor device having excellent durability can be easily configured.

  Hereinafter, preferred embodiments of the wearable sensor device of the present disclosure will be described with reference to the drawings. In the following description, a case where the present invention is applied to a biocompatible sensor device will be described as an example. Moreover, the dimension of the structural member in each figure does not faithfully represent the actual dimension of the structural member, the dimensional ratio of each structural member, or the like.

[Embodiment]
(Configuration example of biocompatible sensor device)
FIG. 1 is a schematic cross-sectional view illustrating an example of a biocompatible sensor device according to the present disclosure. FIG. 2 is a plan view for explaining a specific configuration example of the biocompatible sensor device shown in FIG. In FIG. 1, a biocompatible sensor device 1 of the present embodiment includes a rectangular base material 2, a sensor unit 3, a power supply unit 4, and a communication unit 5 provided on one surface 2 a of the base material 2. And. Moreover, in the biocompatible sensor device 1, as will be described in detail later, the electronic component provided in the sensor unit 3 and the electronic component provided in the power supply unit 4 are electrically connected by the wiring 6a, and the wiring 6b The electronic component provided in the sensor unit 3 and the electronic component provided in the communication unit 5 are electrically connected. Furthermore, in the biocompatible sensor device 1, for example, an adhesive means such as an adhesive or a double-sided tape is attached to the other surface 2 b of the substrate 2. It is configured to be attached (attached) to human skin or the like via an adhesive means.

  As shown in FIG. 2, in the biocompatible sensor device 1, a printed circuit board 4 a provided in the power supply unit 4, a printed circuit board 3 a provided in the sensor unit 3, and a print provided in the communication unit 5. The circuit board 5a is linearly arranged on one surface 2a of the base material 2, and the printed circuit board 3a of the sensor unit 3 and the printed circuit board 4a of the power supply unit 4 are electrically connected by a plurality of wirings 6a. The printed circuit board 3a of the sensor unit 3 and the printed circuit board 5a of the communication unit 5 are electrically connected by a plurality of wires 6b. The biocompatible sensor device 1 constitutes a wearable sensor device having a rectangular shape (adhesive plaster type).

(Example of sensor configuration)
As shown in FIG. 2, the sensor unit 3 is provided on the printed circuit board 3a and the printed circuit board 3a attached to the one surface 2a of the base material 2 by, for example, an unillustrated adhesive means. A three-axis acceleration sensor 3b, a temperature sensor 3c, an atmospheric pressure sensor 3d, and an electrocardiogram sensor 3e are included as electronic components. In the sensor unit 3, power is supplied from the power supply unit 4 through the plurality of wirings 6a, and data detected by each sensor of the sensor unit 3 is transmitted to the communication unit 5 through the plurality of wirings 6b. , Is sent as appropriate.

  The triaxial acceleration sensor 3b, the temperature sensor 3c, the atmospheric pressure sensor 3d, and the electrocardiogram sensor 3e are sensors that acquire predetermined information, and the triaxial acceleration sensor 3b and the electrocardiogram sensor 3e are biocompatible. It is a biological sensor which acquires the information regarding the body (living body) to which the sex sensor device 1 is attached.

  Specifically, the triaxial acceleration sensor 3b can detect each acceleration (momentum) in three directions on the body to which the biocompatible sensor device 1 is attached. It is configured so that data such as degrees can be acquired.

  Moreover, the temperature sensor 3c is comprised so that the data of the ambient temperature of the body to which the biocompatible sensor device 1 was attached can be acquired.

  In addition, the atmospheric pressure sensor 3d is configured to acquire data on atmospheric pressure around the body to which the biocompatible sensor device 1 is attached.

  The electrocardiogram sensor 3e includes two or three electrodes, a processor for acquiring electrocardiogram data of the body to which the biocompatible sensor device 1 is attached based on signals from these electrodes, and the electrodes and the processor. The electrocardiogram sensor 3e can detect the electrocardiogram data of the body by the processor.

(Example of power supply configuration)
As shown in FIG. 2, the power supply unit 4 is provided on the printed circuit board 4a and the printed circuit board 4a attached to the one surface 2a of the base material 2 by, for example, an unillustrated adhesive means. A battery socket 4b and a battery 4c as electronic components are included. Further, in the power supply unit 4, for example, two sockets 4b are installed on the printed circuit board 4a, and for example, a button-type battery 4c is attached to each socket 4b. The power supply unit 4 constitutes a power supply source of the biocompatible sensor device 1.

(Configuration example of the communication unit)
As shown in FIG. 2, the communication unit 5 is provided on the printed circuit board 5a and the printed circuit board 5a attached to the one surface 2a of the base member 2 by, for example, an unillustrated adhesive means. An RFIC (high frequency integrated circuit) 5b, a CPU 5c, an antenna 5d, and a watch crystal resonator 5e are included as electronic components. The communication unit 5 transmits / receives data and instruction signals to / from the outside. That is, in the communication unit 5, when the CPU 5 c receives an instruction signal from the outside, the CPU 5 c outputs an instruction signal to the sensor unit 3. The communication unit 5 transmits data from the sensor unit 3 to the outside via the RFIC 5b and the antenna 5d.

  In addition to the above description, the data acquired by the sensor unit 3 may be automatically transmitted to the outside, for example, every predetermined time based on the time measured by the watch crystal resonator 5e. Good.

(Configuration example of base material)
The base material 2 is made of a stretchable material such as silicone rubber. More specifically, for example, a silicone rubber made of a silicone rubber-based curable composition disclosed in, for example, International Publication No. 2012/133639 pamphlet can be suitably used for the substrate 2. That is, the base material 2 includes vinyl group-containing linear organopolysiloxane (A), organohydrogenpolysiloxane (B), silica particles (C), silane coupling agent (D), platinum or Silicone rubber made of a silicone rubber-based curable composition containing a platinum compound (E) is used, and the base material 2 has elasticity and has little reaction to body tissues even when it comes into contact with a living body. That is, it is made of a material having biocompatibility and durability.

  Moreover, in the base material 2, the thing of the range of the range of about 0.5 micrometer-3000 micrometers, for example, Preferably the range of 0.5 micrometer-1000 micrometers is used. That is, when the base material 2 (biocompatible sensor device 1) is attached to a living body, it is preferable that the thickness of the base material 2 is thin as described above.

  In addition, as the silicone rubber used for the substrate 2, for example, a rubber having a tear strength of 40 N / mm or more is used. Thereby, while having the outstanding elasticity, the base material with which durability was improved can be comprised easily. In addition, the silicone rubber can be used with a low hardness of less than 40 degrees or a high hardness of 40 degrees or more. However, the case where low hardness silicone rubber is used for the base material 2 is preferable in that it can be easily applied to the human body.

<Silicone rubber-based curable composition>
Hereinafter, it demonstrates in detail based on suitable embodiment of the silicone rubber-type curable composition which is 1 aspect of this indication.
First, the silicone rubber-based curable composition of the present disclosure will be described.

  As described above, the silicone rubber-based curable composition of this embodiment includes a vinyl group-containing linear organopolysiloxane (A), an organohydrogenpolysiloxane (B), silica particles (C), and a silane. It contains a coupling agent (D) and platinum or a platinum compound (E).

  Hereinafter, each component which comprises the silicone rubber-type curable composition of this indication is demonstrated one by one.

<< Vinyl group-containing linear organopolysiloxane (A) >>
The vinyl group linear-containing organopolysiloxane (A) is a polymer that is a main component of the silicone rubber-based curable composition of the present disclosure.

  The vinyl group-containing linear organopolysiloxane (A) has a linear structure and contains a vinyl group, and this vinyl group becomes a crosslinking point at the time of curing.

  The vinyl group content of the vinyl group-containing linear organopolysiloxane (A) is not particularly limited, but is preferably 0.01 to 15 mol%, more preferably 0.05 to 12 mol%. preferable. Thereby, the quantity of the vinyl group in vinyl group containing linear organopolysiloxane (A) is optimized, and formation of the network with each component mentioned later can be performed reliably.

  In addition, in this specification, vinyl group content is the mol% of a vinyl group containing siloxane unit when all the units which comprise a vinyl group containing linear organopolysiloxane (A) are 100 mol%. . However, one vinyl group is considered for one vinyl group-containing siloxane unit.

  The degree of polymerization of the vinyl group-containing linear organopolysiloxane (A) is not particularly limited, but is preferably about 3000 to 10000, more preferably about 4000 to 8000.

  Furthermore, the specific gravity of the vinyl group-containing linear organopolysiloxane (A) is not particularly limited, but is preferably in the range of about 0.9 to 1.1.

  By using a vinyl group-containing linear organopolysiloxane (A) having a polymerization degree and specific gravity within the above ranges, the resulting silicone rubber has heat resistance, flame retardancy, chemical stability, etc. Can be improved.

  The vinyl group-containing linear organopolysiloxane (A) is particularly preferably one having a structure represented by the following formula (1).

In the formula (1), R ¹ is a substituted or unsubstituted alkyl group, alkenyl group, aryl group having 1 to 10 carbon atoms, or a hydrocarbon group obtained by combining these. As a C1-C10 alkyl group, a methyl group, an ethyl group, a propyl group etc. are mentioned, for example, Among these, a methyl group is preferable. As a C1-C10 alkenyl group, a vinyl group, an allyl group, a butenyl group etc. are mentioned, for example, Among these, a vinyl group is preferable. Examples of the aryl group having 1 to 10 carbon atoms include a phenyl group.

R ² is a substituted or unsubstituted alkyl group, alkenyl group, aryl group having 1 to 10 carbon atoms, or a hydrocarbon group obtained by combining these. As a C1-C10 alkyl group, a methyl group, an ethyl group, a propyl group etc. are mentioned, for example, Among these, a methyl group is preferable. Examples of the alkenyl group having 1 to 10 carbon atoms include a vinyl group, an allyl group, and a butenyl group. Examples of the aryl group having 1 to 10 carbon atoms include a phenyl group.

R ³ is a substituted or unsubstituted alkyl group having 1 to 8 carbon atoms, an aryl group, or a hydrocarbon group obtained by combining these. As a C1-C8 alkyl group, a methyl group, an ethyl group, a propyl group etc. are mentioned, for example, Among these, a methyl group is preferable. Examples of the aryl group having 1 to 8 carbon atoms include a phenyl group.

Furthermore, examples of the substituent for R ¹ and R ² in Formula (1) include a methyl group and a vinyl group, and examples of the substituent for R ³ include a methyl group.

In the formula (1), a plurality of R ¹ are independent from each other and may be different from each other or the same. The same applies to R ² and R ³ .

  Further, m and n are the number of repeating units constituting the vinyl group-containing linear organopolysiloxane (A) represented by the formula (1), m is an integer of 1 to 1000, and n is 3000 to 10,000. Is an integer. m is preferably 40 to 700, and n is preferably 3600 to 8000.

  Moreover, as a specific structure of a vinyl group containing linear organopolysiloxane (A) represented by Formula (1), what is represented, for example by following formula (1-1) is mentioned.

In Formula (1-1), R ¹ and R ² are each independently a methyl group or a vinyl group, and at least one is a vinyl group.

  Furthermore, as the vinyl group-containing linear organopolysiloxane (A) as described above, a first vinyl group-containing linear organopolysiloxane having a vinyl group content of 0.05 to 0.2 mol% ( It is preferable to contain A1) and a second vinyl group-containing linear organopolysiloxane (A2) having a vinyl group content of 0.5 to 12 mol%. As raw rubber which is a raw material of silicone rubber, a first vinyl group-containing linear organopolysiloxane (A1) having a general vinyl group content and a second vinyl group-containing linear chain having a high vinyl group content By combining with organopolysiloxane (A2), vinyl groups can be unevenly distributed, and the crosslink density can be more effectively formed in the crosslinked network of silicone rubber. As a result, the tear strength of the silicone rubber can be increased more effectively.

Specifically, as the vinyl group-containing linear organopolysiloxane (A), for example, in the above formula (1-1), R ¹ is a vinyl group and / or R ² is a vinyl group. 0.05 to 0.2 mol% of the first vinyl group-containing linear organopolysiloxane (A1), R ¹ is a vinyl group and / or R ² is a vinyl group. It is preferable to use the second vinyl group-containing linear organopolysiloxane (A2) containing 5 to 12 mol%.

  The first vinyl group-containing linear organopolysiloxane (A1) preferably has a vinyl group content of 0.1 to 0.15 mol%. The second vinyl group-containing linear organopolysiloxane (A2) preferably has a vinyl group content of 0.8 to 8.0 mol%.

  Further, when the first vinyl group-containing linear organopolysiloxane (A1) and the second vinyl group-containing linear organopolysiloxane (A2) are combined in combination, the ratio of (A1) to (A2) Is not particularly limited, but it is usually preferred that (A1) :( A2) in a weight ratio is 1: 0.05 to 1: 0.6, and is 1: 0.08 to 1: 0.5. Is more preferable.

  Each of the first and second vinyl group-containing linear organopolysiloxanes (A1) and (A2) may be used alone or in combination of two or more.

<< organohydrogenpolysiloxane (B) >>
The organohydrogenpolysiloxane (B) is classified into a linear organohydrogenpolysiloxane (B1) having a linear structure and a branched organohydrogenpolysiloxane (B2) having a branched structure. Only the linear organohydrogenpolysiloxane (B1) or the branched organohydrogenpolysiloxane (B2) may be used, or these linear organohydrogenpolysiloxane (B1) and the branched organohydro Both of the polypolysiloxane (B2) may be contained.

  The linear organohydrogenpolysiloxane (B1) has a linear structure and a structure in which hydrogen is directly bonded to Si (≡Si—H), and a vinyl group-containing linear organopolysiloxane ( In addition to the vinyl group of A), it is a polymer that undergoes a hydrosilylation reaction with a vinyl group contained in a component blended in the silicone rubber-based curable composition to crosslink these components.

  The molecular weight of the linear organohydrogenpolysiloxane (B1) is not particularly limited, but the weight average molecular weight is preferably 20000 or less, and more preferably 1000 or more and 10,000 or less.

  The weight average molecular weight of the linear organohydrogenpolysiloxane (B1) can be measured by GPC (gel permeation chromatography).

  Moreover, it is preferable that the linear organohydrogenpolysiloxane (B1) usually has no vinyl group. Thereby, it can prevent exactly that a crosslinking reaction advances in the molecule | numerator of linear organohydrogenpolysiloxane (B1).

  As the linear organohydrogenpolysiloxane (B1) as described above, for example, those having a structure represented by the following formula (2) are preferably used.

In Formula (2), R ⁴ is a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, an alkenyl group, an aryl group, a hydrocarbon group combining these, or a hydride group. As a C1-C10 alkyl group, a methyl group, an ethyl group, a propyl group etc. are mentioned, for example, Among these, a methyl group is preferable. As a C1-C10 alkenyl group, a vinyl group, an allyl group, a butenyl group etc. are mentioned, for example, Among these, a vinyl group is preferable. Examples of the aryl group having 1 to 10 carbon atoms include a phenyl group.

R ⁵ is a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, an alkenyl group, an aryl group, a hydrocarbon group combining these, or a hydride group. Examples of the alkyl group having 1 to 10 carbon atoms include a methyl group, an ethyl group, and a propyl group, and among them, a methyl group is preferable. As a C1-C10 alkenyl group, a vinyl group, an allyl group, a butenyl group etc. are mentioned, for example, Among these, a vinyl group is preferable. Examples of the aryl group having 1 to 10 carbon atoms include a phenyl group.

In the formula (2), the plurality of R ⁴ are independent from each other and may be different from each other or the same. The same applies to R ⁵ . However, at least two of the plurality of R ⁴ and R ⁵ are hydride groups.

R ⁶ is a substituted or unsubstituted alkyl group having 1 to 8 carbon atoms, an aryl group, or a hydrocarbon group obtained by combining these. As a C1-C8 alkyl group, a methyl group, an ethyl group, a propyl group etc. are mentioned, for example, Among these, a methyl group is preferable. Examples of the aryl group having 1 to 8 carbon atoms include a phenyl group. The plurality of R ⁶ are independent from each other and may be different from each other or the same.

In addition, as a substituent of R < ⁴ >, R < ⁵ >, R < ⁶ > in Formula (2), a methyl group, a vinyl group, etc. are mentioned, for example, and a methyl group is preferable from a viewpoint of preventing the intramolecular crosslinking reaction.

  Further, m and n are the number of repeating units constituting the linear organohydrogenpolysiloxane (B1) represented by the formula (2), m is an integer of 0 to 300, and n is (300-m ). Preferably, m is an integer of 0 to 150, and n is an integer of (150-m).

  In addition, linear organohydrogenpolysiloxane (B1) may be used individually by 1 type, and may be used in combination of 2 or more type.

  Since the branched organohydrogenpolysiloxane (B2) has a branched structure, it forms a region having a high crosslinking density and is a component that greatly contributes to the formation of a dense structure having a crosslinking density in the system of silicone rubber. Further, like the above linear organohydrogenpolysiloxane (B1), it has a structure in which hydrogen is directly bonded to Si (≡Si—H), and the vinyl group of the vinyl group-containing linear organopolysiloxane (A) has a structure. In addition, it is a polymer that undergoes a hydrosilylation reaction with the vinyl group of the components blended in the silicone rubber-based curable composition and crosslinks these components.

  The specific gravity of the branched organohydrogenpolysiloxane (B2) is in the range of 0.9 to 0.95.

  Furthermore, it is preferable that the branched organohydrogenpolysiloxane (B2) usually has no vinyl group. Thereby, it can prevent exactly that a crosslinking reaction advances in the molecule | numerator of branched organohydrogenpolysiloxane (B2).

  Further, as the branched organohydrogenpolysiloxane (B2), those represented by the following average composition formula (c) are preferable.

Average composition formula (c)
^{_{(H a (R 7) 3}} - a SiO 1/2) m (SiO 4/2) n
(In the formula (c), R ⁷ is a monovalent organic group, a is an integer in the range of 1 to 3, m is the number of H _a (R ⁷ ) _{3 -a} SiO _1/2 units, and n is SiO _{4 / 2} unit number).

In the formula (c), R ⁷ is a monovalent organic group, preferably a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, an aryl group, or a hydrocarbon group obtained by combining these. As a C1-C10 alkyl group, a methyl group, an ethyl group, a propyl group etc. are mentioned, for example, Among these, a methyl group is preferable. Examples of the aryl group having 1 to 10 carbon atoms include a phenyl group.

  In the formula (c), a is the number of hydride groups (hydrogen atoms directly bonded to Si), an integer in the range of 1 to 3, and preferably 1.

In the formula (c), m is the number of H _a (R ⁷ ) _{3 −a} SiO _1/2 units, and n is the number of SiO _4/2 units.

  The branched organohydrogenpolysiloxane (B2) has a branched structure. The linear organohydrogenpolysiloxane (B1) differs from the branched organohydrogenpolysiloxane (B2) in that the structure is linear or branched. The number of alkyl groups R to be bonded (R / Si) is 1.8 to 2.1 for linear organohydrogenpolysiloxane (B1), and 0.8 to 1 for branched organohydrogenpolysiloxane (B2). .7 range.

  Since the branched organohydrogenpolysiloxane (B2) has a branched structure, for example, the amount of the residue when heated to 1000 ° C. at a heating rate of 10 ° C./min in a nitrogen atmosphere is 5% or more. It becomes. On the other hand, since the linear organohydrogenpolysiloxane (B1) is linear, the amount of residue after heating under the above conditions is almost zero.

  Specific examples of the branched organohydrogenpolysiloxane (B2) include those having a structure represented by the following formula (3).

In Formula (3), R ⁷ is a substituted or unsubstituted alkyl group having 1 to 8 carbon atoms, an aryl group, a hydrocarbon group obtained by combining these, or a hydrogen atom. As a C1-C8 alkyl group, a methyl group, an ethyl group, a propyl group etc. are mentioned, for example, Among these, a methyl group is preferable. Examples of the aryl group having 1 to 8 carbon atoms include a phenyl group. Examples of the substituent for R ⁷ include a methyl group.

In formula (3), a plurality of R ⁷ are independent from each other and may be different from each other or the same.

  In Formula (3), “—O—Si≡” represents that Si has a branched structure spreading in three dimensions.

  In addition, a branched organohydrogenpolysiloxane (B2) may be used individually by 1 type, and may be used in combination of 2 or more type.

  In the linear organohydrogenpolysiloxane (B1) and the branched organohydrogenpolysiloxane (B2), the amount of hydrogen atoms (hydride groups) directly bonded to Si is not particularly limited. However, in the silicone rubber-based curable composition, the linear organohydrogenpolysiloxane (B1) and the branched organohydrogenpoly are used with respect to 1 mol of the vinyl group in the vinyl group-containing linear organopolysiloxane (A). The amount of the total amount of hydride groups of siloxane (B2) is preferably 0.5 to 5 mol, and more preferably 1 to 3.5 mol. This ensures the formation of a crosslinked network between the linear organohydrogenpolysiloxane (B1) and the branched organohydrogenpolysiloxane (B2) and the vinyl group-containing linear organopolysiloxane (A). Can be made.

  Moreover, in the linear organohydrogenpolysiloxane (B1) and the branched organohydrogenpolysiloxane (B2), the linear organohydrogenpolysiloxane (B1) is usually the main component in the silicone rubber-based curable composition. As described above, the branched organohydrogenpolysiloxane (B2) is added when a region having a high crosslinking density is formed in the silicone rubber. Therefore, when the linear organohydrogenpolysiloxane (B1) and the branched organohydrogenpolysiloxane (B2) are combined in combination, the ratio of (B1) and (B2) is (B1) by weight ratio: (B2) is preferably set to 1: 0.1 to 1: 1, more preferably 1: 0.2 to 1: 0.5.

<< Silica particles (C) >>
Silica particles (C) are components added for the purpose of improving the hardness and mechanical strength of the silicone rubber to be formed, particularly for improving the tensile strength.

  The silica particles (C) preferably have a specific surface area of about 50 to 400 m <2> / g, and more preferably about 100 to 400 m <2> / g. Moreover, it is preferable that the average particle diameter is about 1-100 nm, and it is more preferable that it is about 5-20 nm.

  By using what is in the range of this specific surface area and average particle diameter as a silica particle (C), the function as a silica particle (C) mentioned above can be exhibited notably.

  Although it does not specifically limit as a silica particle (C), For example, fumed silica, baked silica, precipitated silica, etc. are mentioned.

  In addition, a silica particle (C) may be used individually by 1 type, and may be used in combination of 2 or more type.

<< Silane coupling agent (D) >>
In the present invention, the silane coupling agent (D) has a hydrolyzable group, and this hydrolyzable group is hydrolyzed with water to form a hydroxyl group, and this hydroxyl group becomes a hydroxyl group on the surface of the silica particles (C). The surface modification of the silica particles (C) is performed by dehydration condensation reaction.

  Moreover, this silane coupling agent (D) has a hydrophobic group. Thereby, since this hydrophobic group is imparted to the surface of the silica particles (C), the cohesive force of the silica particles (C) is reduced in the silicone rubber-based curable composition and thus in the silicone rubber (hydrogen due to silanol groups). As a result, it is presumed that the dispersibility of the silica particles in the composition is improved. Thereby, the interface of a silica particle and a rubber matrix increases, and the reinforcement effect of a silica particle increases. Furthermore, when the rubber matrix is deformed, it is presumed that the sliding property of the silica particles in the matrix is improved. And the mechanical strength (for example, tensile strength, tear strength, etc.) of the silicone rubber by a silica particle improves by the improvement of the dispersibility of the said silica particle, and the improvement of slipperiness.

  Furthermore, the silane coupling agent (D) preferably has a vinyl group. Thereby, a vinyl group is introduce | transduced into the surface of a silica particle (C). Therefore, when the silicone rubber-based curable composition is cured, that is, the vinyl group of the vinyl group-containing linear organopolysiloxane (A) and the hydride group of the organohydrogenpolysiloxane (B) are hydrosilylated. When the reaction forms a network (crosslinked structure), the vinyl groups of the silica particles (C) are also involved in the hydrosilylation reaction with the hydride groups of the organohydrogenpolysiloxane (B). The silica particles (C) are also taken into the network. Thereby, it is possible to increase the hardness and modulus of the formed silicone rubber.

  As such a silane coupling agent (D), what is represented by following formula (4) is mentioned, for example.

Y _n —Si— (OR) _4-n (4)
In said formula (4), n represents the integer of 1-3. Y represents a functional group of any one having a hydrophobic group, a hydrophilic group or a vinyl group. When n is 1, it is a hydrophobic group, and when n is 2 or 3, at least one of them is a hydrophobic group. It is a hydrophobic group. OR represents a hydrolyzable group.

  The hydrophobic group is an alkyl group having 1 to 6 carbon atoms, an aryl group, or a hydrocarbon group that is a combination thereof, and examples thereof include a methyl group, an ethyl group, a propyl group, and a phenyl group. A methyl group is preferred.

  Examples of the hydrophilic group include a hydroxyl group, a sulfonic acid group, a carboxyl group, and a carbonyl group. Among these, a hydroxyl group is particularly preferable. The hydrophilic group may be included as a functional group, but is preferably not included from the viewpoint of imparting hydrophobicity to the silane coupling agent (D).

  Furthermore, examples of the hydrolyzable group include an alkoxy group such as a methoxy group and an ethoxy group, a chloro group, and a silazane group. Among them, a silazane group is preferable because of its high reactivity with the silica particles (C). In addition, what has a silazane group as a hydrolysable group will have two (Yn-Si-) structures in the said Formula (4) from the structural characteristic.

  Specific examples of the silane coupling agent (D) represented by the above formula (4) include, for example, methyltrimethoxysilane, dimethyldimethoxysilane, phenyltrimethoxysilane, methyltrimethoxysilane, having a hydrophobic group as a functional group. Alkoxysilanes such as ethoxysilane, dimethyldiethoxysilane, phenyltriethoxysilane, n-propyltrimethoxysilane, n-propyltriethoxysilane, hexyltrimethoxysilane, hexyltriethoxysilane, decyltrimethoxysilane; methyltrichlorosilane Chlorosilanes such as dimethyldichlorosilane, trimethylchlorosilane, and phenyltrichlorosilane; hexamethyldisilazane, and methacryloxypropyltriethoxysilane having a vinyl group as a functional group. , Alkoxysilanes such as methacryloxypropyltrimethoxysilane, methacryloxypropylmethyldiethoxysilane, methacryloxypropylmethyldimethoxysilane, vinyltriethoxysilane, vinyltrimethoxysilane, vinylmethyldimethoxysilane; vinyltrichlorosilane, vinylmethyl Chlorosilanes such as dichlorosilane; divinyltetramethyldisilazane can be mentioned. Among them, considering the above description, hexamethyldisilazane having a hydrophobic group and divinyltetramethyl having a vinyl group are particularly preferable. Disilazane is preferred.

<< Platinum or platinum compound (E) >>
Platinum or a platinum compound (E) is a component that acts as a catalyst during curing, and the amount added is a catalytic amount.

  As the platinum or platinum compound (E), known ones can be used, for example, platinum black, platinum supported on silica or carbon black, chloroplatinic acid or an alcohol solution of chloroplatinic acid, chloride Examples thereof include complex salts of platinum acid and olefins, complex salts of chloroplatinic acid and vinyl siloxane, and the like.

  In addition, platinum or platinum compound (E) which is a catalyst component may be used individually by 1 type, and may be used in combination of 2 or more type.

<< Water (F) >>
The silicone rubber-based curable composition of the present invention may contain water (F) in addition to the components (A) to (E).

  Water (F) is a component that functions as a dispersion medium for dispersing each component contained in the silicone rubber-based curable composition and contributes to the reaction between the silica particles (C) and the silane coupling agent (D). .

  Furthermore, the silicone rubber-based curable composition of the present invention may contain known components blended in the silicone rubber-based curable composition in addition to the components (A) to (F). Examples thereof include diatomaceous earth, iron oxide, zinc oxide, titanium oxide, barium oxide, magnesium oxide, cerium oxide, calcium carbonate, magnesium carbonate, zinc carbonate, glass wool, and mica. In addition, dispersants, pigments, dyes, antistatic agents, antioxidants, flame retardants, thermal conductivity improvers, and the like can be appropriately blended.

  In the silicone rubber-based curable composition, the content ratio of each component is not particularly limited, but is set as follows, for example.

  That is, the silica particles (C) are preferably contained at a ratio of 10 to 100 parts by weight of the silica particles (C) with respect to 100 parts by weight of the total amount of (A) and (B). More preferably, it is contained in a proportion of 75 parts by weight. Thereby, the tensile strength of the silicone rubber can be reliably improved to the target range.

  The silane coupling agent (D) is preferably contained in a proportion of 5 to 100 parts by weight of the silane coupling agent (D) with respect to 100 parts by weight of the silica particles (C), and in a proportion of 10 to 40 parts by weight. It is more preferable to contain. Thereby, the dispersibility in the silicone rubber-type curable composition of a silica particle (C) can be improved reliably.

  The content of platinum or platinum compound (E) means the amount of catalyst and can be set as appropriate. Specifically, the content of platinum or platinum compound (E) is 0.1% relative to 100 parts by weight of the total amount of (A) and (B). It is preferably in the range of 01 to 5 parts by weight, and more preferably in the range of 0.02 to 0.2 parts by weight. Thereby, reaction with a vinyl group containing linear organopolysiloxane (A) and organohydrogenpolysiloxane (B) can be advanced more reliably.

  Furthermore, when water (F) is contained, the content can be appropriately set. Specifically, the range is 10 to 100 parts by weight with respect to 100 parts by weight of the silane coupling agent (D). It is preferable that it is in the range of 30 to 70 parts by weight. Thereby, reaction with a silane coupling agent (D) and a silica particle (C) can be advanced more reliably.

  In the silicone rubber-based curable composition having such a structure, since the silica particles (C) and the silane coupling agent (D) as described above are included, the silica rubber (C Surface modification by the silane coupling agent (D) of C) proceeds. Accordingly, the dispersibility of the silica particles (C) in the silicone rubber-based curable composition is improved stepwise, and due to this, the silicone rubber obtained by curing the silicone rubber-based curable composition It is inferred that the strength (particularly, tensile strength and tear strength) is improved.

  The silicone rubber-based curable composition and the silicone rubber having such a configuration are produced, for example, as follows.

Hereinafter, a case where a silicone rubber is produced by preparing a silicone rubber-based curable composition and then curing the silicone rubber-based curable composition will be described.
<Method for producing silicone rubber>
The silicone rubber is prepared by uniformly mixing the above-described components with an arbitrary kneading apparatus to prepare a silicone rubber-based curable composition, and then heating and curing the silicone rubber-based curable composition. Although it can be obtained, a silicone rubber having superior strength can be obtained by producing it by the following steps.

  [1] First, a predetermined amount of vinyl group-containing linear organopolysiloxane (A), silica particles (C), and silane coupling agent (D) are weighed, and then kneaded by an arbitrary kneading apparatus. Thus, a kneaded material containing these components (A), (C), and (D) is obtained.

  This kneaded product is obtained by kneading the vinyl group-containing linear organopolysiloxane (A) and the silane coupling agent (D) in advance, and then kneading (mixing) the silica particles (C). preferable. Thereby, the dispersibility of the silica particles (C) in the vinyl group-containing linear organopolysiloxane (A) is further improved.

  Moreover, when obtaining this kneaded material, you may make it add water (F) to each component (A), (C), (D) as needed.

  Furthermore, kneading of the components (A), (C), and (D) is preferably performed through a first step of heating at the first temperature and a second step of heating at the second temperature. Thereby, in the first step, the surface of the silica particles (C) can be surface-treated with the coupling agent (D), and in the second step, the silica particles (C) and the coupling agent (D) By-products generated by the reaction can be reliably removed from the kneaded product.

  The first temperature is preferably about 40 to 120 ° C, and more preferably about 60 to 90 ° C. The second temperature is preferably about 130 to 210 ° C, and more preferably about 160 to 180 ° C.

  The atmosphere in the first step is preferably an inert atmosphere such as a nitrogen atmosphere, and the atmosphere in the second step is preferably a reduced pressure atmosphere.

  Furthermore, the time of the first step is preferably about 0.3 to 1.5 hours, and more preferably about 0.5 to 1.2 hours. The time for the second step is preferably about 0.7 to 3.0 hours, and more preferably about 1.0 to 2.0 hours.

  By setting the first step and the second step as described above, the effect can be obtained more remarkably.

  [2] Next, a predetermined amount of the organohydrogenpolysiloxane (B) and platinum or the platinum compound (E) are weighed, and then the kneaded material prepared in the step [1] using an arbitrary kneading apparatus. In addition, the silicone rubber-based curable composition is obtained by kneading the components (B) and (E). The organohydrogenpolysiloxane (B) includes either a linear organohydrogenpolysiloxane (B1) having a linear structure or a branched organohydrogenpolysiloxane (B2) having a branched structure. Or both.

  When kneading each of the components (B) and (E), the kneaded material prepared in advance in the step [1] and the organohydrogenpolysiloxane (B) were prepared in the step [1]. It is preferable to knead the kneaded material and platinum or the platinum compound (E), and then knead each kneaded material. Thereby, each component (A)-(E) is made into a silicone rubber-type curable composition, without making reaction of vinyl group containing linear organopolysiloxane (A) and organohydrogenpolysiloxane (B) advance. It can be reliably dispersed in.

  The temperature at which the components (B) and (E) are kneaded is preferably about 10 to 70 ° C., more preferably about 25 to 30 ° C. as the roll setting temperature.

  Furthermore, the kneading time is preferably about 5 minutes to 1 hour, and more preferably about 10 to 40 minutes.

  By setting this temperature range, the progress of the reaction between the vinyl group-containing linear organopolysiloxane (A) and the organohydrogenpolysiloxane (B) can be more accurately prevented or suppressed, and the kneading time can be further reduced. By making this into such a range, each component (A)-(E) can be more reliably disperse | distributed in a silicone rubber-type curable composition.

  The kneading apparatus used in each of the steps [1] and [2] is not particularly limited, and for example, a kneader, two rolls, a Banbury mixer (continuous kneader), a pressure kneader, or the like can be used.

  In this step [2], a reaction inhibitor such as 1-ethynylcyclohexanol may be added to the kneaded product. As a result, even when the temperature of the kneaded product is set to a relatively high temperature, the progress of the reaction between the vinyl group-containing linear organopolysiloxane (A) and the organohydrogenpolysiloxane (B) is more accurately prevented. Or it can be suppressed.

  [3] Next, a silicone rubber is formed by curing the silicone rubber-based curable composition.

  The silicone rubber curable resin composition is cured by, for example, heating (primary curing) at 140 to 180 ° C. for 5 to 15 minutes and then post-baking (secondary curing) at 200 ° C. for 4 hours. . Silicone rubber is obtained through the steps as described above.

  Furthermore, by using the silicone rubber as described above, a molded article having excellent mechanical strength can be obtained.

  The silicone rubber-based curable composition has been described above, but the present disclosure is not limited thereto.

  For example, the silicone rubber-based curable composition of the present disclosure may contain an optional component that can exhibit the same function.

(Wiring configuration example)
For the wirings 6a and 6b, a stretchable material, for example, a composite of silicone rubber and a conductive material is used. More specifically, the wirings 6a and 6b include, for example, the same silicone rubber as the base material 2, and a conductive filler such as silver or copper, an ionic liquid, a conductive polymer, a conductive organic compound, a carbon material, or a conductive wire. A composite with a conductive material such as is used. The wirings 6a and 6b are provided on the surface 2a of the substrate 2 by, for example, a printing method. In addition, since the wiring 6a and 6b are provided by the printing method and the sensor unit 3, the power supply unit 4, and the communication unit 5 are connected in this way, the biocompatible sensor device 1 having a simple structure and easy manufacture can be easily obtained. Can be configured.

  Moreover, the compound which comprises wiring 6a and 6b is manufactured as follows.

  First, a silicone rubber is dissolved in tetradecane so that tetradecane is 70 wt% and silicone rubber is 30 wt% to prepare a tetradecane solution of silicone rubber.

  Next, for example, a silver filler is added to the tetradecane solution so that when the tetradecane is completely volatilized, the silver filler is 85 wt% and the solute silicone rubber is 15 wt%. Then, it disperse | distributes and stirs with a rotation-revolution mixer, a three roll, etc., and completes an electrically conductive paste. The conductive paste has a viscosity of, for example, about 54 Pa · s, and can be easily applied and formed on the substrate 2 by a printing method. Moreover, after providing this electrically conductive paste on the base material 2, it heat-hardens, for example by heating at 170 degreeC for 1 hour, and is provided as the wiring 6a and 6b on the base material 2. FIG.

  As described above, in the wirings 6a and 6b, excellent stretchability is secured by using silicone rubber having high tear strength.

  In the biocompatible sensor device 1 configured as described above, the base material 2 in which the triaxial acceleration sensor 3b, the temperature sensor 3c, the atmospheric pressure sensor 3d, and the electrocardiogram sensor 3e are stretchable as electronic components of the sensor unit 3. It is provided above. In addition, a socket 4b and a battery 4c are provided on the base material 2 as electronic parts of the power supply unit 4, and an RFIC 5b, a CPU 5c, an antenna 5d, and a quartz crystal 5e for a watch are provided as the electronic parts of the communication unit 5. It is provided above. Further, the electronic component of the sensor unit 3 and the electronic component of the power supply unit 4 are connected by a stretchable wiring 6a, and the electronic component of the sensor unit 3 and the electronic component of the communication unit 5 are connected by a stretchable wiring 6b. Has been. Thereby, in this embodiment, unlike the said prior art example, the biocompatible sensor device (wearable sensor device) 1 excellent in durability can be comprised.

  In the present embodiment, the sensor unit 3 is provided with the triaxial acceleration sensor 3b, the temperature sensor 3c, the atmospheric pressure sensor 3d, and the electrocardiogram sensor 3e, so that the corresponding predetermined information is acquired by each of these sensors. can do. Furthermore, since the three-axis acceleration sensor 3b and the electrocardiogram sensor 3e are provided, information about the living body can be acquired.

  Moreover, in this embodiment, since the silicone rubber is used for the base material 2, the base material 2 which has the outstanding durability can be comprised, and the biocompatible sensor device 1 excellent in the durability is provided. It can be easily configured.

  Moreover, in this embodiment, since the composite of silicone rubber and a conductive material is used for the wirings 6a and 6b, the wirings 6a and 6b having excellent durability can be configured, and the durability is improved. An excellent biocompatible sensor device 1 can be easily configured.

  The above embodiments are all illustrative and not restrictive. The technical scope of the present invention is defined by the claims, and all modifications within the scope equivalent to the configurations described therein are also included in the technical scope of the present invention.

  For example, in the above description, a case where a biocompatible sensor device is used as a wearable sensor device has been described. However, the present invention is not limited to this, and may be appropriately attached to a structure such as a machine or an apparatus. Further, the present invention may be applied to a detachable sensor device that sequentially detects predetermined information such as the surface temperature and vibration.

  In the above description, a sensor unit having several types of sensors, a power source unit including a battery, and a communication unit including a CPU and an antenna are provided on the base material, and the sensor unit, the power source unit, and the sensor unit are provided. Although the structure which connected each communication part by wiring was demonstrated, this invention has a base material which has a stretching property, two or more electronic components provided on the base material, and has two or more stretching properties. There is no limitation as long as it has wiring for connecting the electronic components.

  Next, specific examples of the present disclosure will be described. In addition, this indication is not limited to description of these Examples at all.

[Examples 1 to 23, Comparative Examples 1 and 2]
1. Preparation of raw materials First, raw materials used in Examples 1 to 23 and Comparative Examples 1 and 2 described later are shown below.

  (1) First vinyl group-containing linear organopolysiloxane (A1) (vinyl group content 0.13 mol%): synthesized by the following synthesis scheme.

  (2) Second vinyl group-containing linear organopolysiloxane (A2) (vinyl group content: 0.92 mol%): Synthesized by the following synthesis scheme.

(3) Organohydrogenpolysiloxane (B)
(B1) linear organohydrogenpolysiloxane and (B2) branched organohydrogenpolysiloxane (Table 1 below)

(4) Silica particles (C-1): Silica fine particles (specific surface area 300 m ² / g), manufactured by Nippon Aerosil Co., Ltd., “AEROSIL 300” were prepared.

(5) Silica particles (C-2): Silica fine particles (specific surface area 200 m ² / g), “AEROSIL 200” manufactured by Nippon Aerosil Co., Ltd. were prepared.

  (6) Silane coupling agent (D-1): Hexamethyldisilazane (HMDZ), manufactured by Gelst, “HEXAMETHYLDISILAZANE (SIH6110.1)” was prepared.

  (7) Silane coupling agent (D-2): Divinyltetramethyldisilazane, manufactured by Gelst, “1,3-DIVINYLTETRAMETHYLDISILAZANE (SID4612.0)” was prepared.

  (8) Catalyst (platinum or platinum compound) (E): A platinum compound, “PLATINUMDIVINTYLETRAMETHYLDISILOXANE COMPLEX in xylen (SIP6831.2)” manufactured by Gelest Co., Ltd. was prepared.

[Synthesis of first vinyl group-containing linear organopolysiloxane (A1)]
According to the following scheme (4), a first vinyl group-containing linear organopolysiloxane was synthesized.

  That is, to a 300 mL separable flask having a cooling tube and a stirring blade substituted with Ar gas, 74.7 g (252 mmol) of octamethylcyclotetrasiloxane, 2,4,6,8-tetramethyl 2,4,6,8- 0.086 g (0.25 mmol) of tetravinylcyclotetrasiloxane and 0.1 g of potassium siliconate were added, the temperature was raised, and the mixture was stirred at 120 ° C. for 30 minutes. At this time, an increase in viscosity was confirmed.

  Thereafter, the temperature was raised to 155 ° C., and stirring was continued for 3 hours. After 3 hours, 0.1 g (0.6 mmol) of 1,3-divinyltetramethyldisiloxane was added, and the mixture was further stirred at 155 ° C. for 4 hours.

  Further, after 4 hours, the mixture was diluted with 250 mL of toluene and then washed with water three times. The washed organic layer was washed several times with 1.5 L of methanol, and purified by reprecipitation to separate the oligomer and polymer. The obtained polymer was dried at 60 ° C. under reduced pressure overnight to obtain a first vinyl group-containing linear organopolysiloxane (A1) (Mn = 277,734, Mw = 573,906, IV value (dl / g) = 0.89).

[Synthesis of second vinyl group-containing linear organopolysiloxane (A2)]
In the synthesis of (A1), the same as above except that 0.86 g (2.5 mmol) of 2,4,6,8-tetramethyl 2,4,6,8-tetravinylcyclotetrasiloxane was used. Thus, a second vinyl group-containing linear organopolysiloxane (A2) was synthesized.

[(B) Organohydrogenpolysiloxane]
As (B1) linear organohydrogenpolysiloxane and (B2) branched organohydrogenpolysiloxane, those shown in Table 1 below were used.

(B1) Linear organohydrogenpolysiloxane The following represented by the following formula (5) was used.

88466 (trade name, manufactured by Montmentive Performance Materials Japan GK, polydimethyl-co-methylhydride siloxane, m = 14, n = 11 in formula (5))
HMS-082 (trade name, manufactured by Gelest, Inc., Methyl Hydrosiloxane- (Dimethylsiloxane Copolymers, Trimethylsiloxane terminated, weight average molecular weight: 5500-6500, MeHSiO: 7-5 mole%, 7-5 mole%)
HMS-501 (trade name, manufactured by Gelest, Inc., Methyl Hydrosiloxane- (Dimethylsiloxane Copolymers, Trimethylsiloxane terminated, weight average molecular weight: 900-1200, MeHSiO: 50-55 mole%, 4−55 mole%)

ＨＤＰ−１１１（商品名、Ｇｅｌｅｓｔ， Ｉｎｃ．製、ｐｏｌｙＰｈｅｎｙｌ−（ＤｉＭｅｔｈｙｌＨｙｄｒｏｓｉｌｏｘｙ）ｓｉｌｏｘａｎｅ， ｈｙｄｒｉｄｅ ｔｅｒｍｉｎａｔｅｄ、［（ＨＭｅ２ ＳｉＯ）（Ｃ６ Ｈ３ Ｓｉ）Ｏ］： ９９−１００ｍｏｌｅ％、下記式（７））

(B2) Branched organohydrogenpolysiloxane HQM-107 (trade name, manufactured by Gelest, Inc., Hydride Q Resin, the following formula (6))

HDP-111 (trade name, manufactured by Gelest, Inc., polyPhenyl- (DiMethyl Hydrosiloxy) siloxane, hydride terminated, [(HMe2SiO) (C6H3Si) O]: 99-100 mole%, following formula (7)

2. Preparation of silicone rubber-based curable composition [Example 1]
First, 100 parts by weight of vinyl group-containing linear organopolysiloxane (A) [(A1) :( A2) = 80 parts by weight: 20 parts by weight], 10 parts by weight of hexamethyldisilazane (D-1), Kneading in advance 0.5 parts by weight of divinyltetramethyldisilazane (D-2) and 5.25 parts by weight of water (F), and then kneading by adding 60 parts by weight of silica particles (C-1). A kneaded product (silicone rubber compound) was obtained.

  The kneading after the addition of the silica particles (C-1) is a first step of kneading for 1 hour under a nitrogen atmosphere at 60 to 90 ° C. for the coupling reaction, and removal of a by-product (ammonia). Therefore, it went through the 2nd step which knead | mixes for 2 hours under the conditions of 160-180 degreeC under pressure reduction atmosphere. Further, the obtained kneaded product was cooled to room temperature.

  Next, after adding 0.46 part by weight of the linear organohydrogenpolysiloxane (B1) and 0.05 part by weight of the platinum compound (E) to this kneaded product, the silicone rubber is kneaded with a roll. A system curable composition was obtained.

[Example 2]
The silicone rubber system was the same as in Example 1 except that 0.53 parts by weight of the linear organohydrogenpolysiloxane (B1) and 65 parts by weight of the silica particles (C-1) were filled. A curable composition was prepared.

[Example 3]
The silicone rubber system was the same as in Example 1 except that 0.70 parts by weight of the linear organohydrogenpolysiloxane (B1) and 70 parts by weight of the silica particles (C-1) were filled. A curable composition was prepared.

[Example 4]
First, 100 parts by weight of vinyl group-containing linear organopolysiloxane (A) [(A1) :( A2) = 80 parts by weight: 20 parts by weight] and 10.5 parts by weight of hexamethyldisilazane (D-1) And 5.25 parts by weight of water (F) were previously kneaded, and then 45 parts by weight of silica particles (C-1) were added and kneaded to obtain a kneaded product (silicone rubber compound).

  The kneading after the addition of the silica particles (C-1) is a first step of kneading for 1 hour under a nitrogen atmosphere at 60 to 90 ° C. for the coupling reaction, and removal of a by-product (ammonia). Therefore, it went through the 2nd step which knead | mixes for 2 hours under the conditions of 160-180 degreeC under pressure reduction atmosphere. Further, the obtained kneaded product was cooled to room temperature.

  Next, after adding 0.41 part by weight of the linear organohydrogenpolysiloxane (B1) and 0.05 part by weight of the platinum compound (E) to this kneaded product, the silicone rubber is kneaded with a roll. A system curable composition was obtained.

[Example 5]
The silicone rubber system was the same as in Example 4 except that 0.39 parts by weight of the linear organohydrogenpolysiloxane (B1) and 50 parts by weight of the silica particles (C-1) were filled. A curable composition was prepared.

[Example 6]
In the same manner as in Example 4 except that 0.48 parts by weight of the linear organohydrogenpolysiloxane (B1) and 55 parts by weight of the silica particles (C-1) were filled, a silicone rubber system A curable composition was prepared.

[Example 7]
In the same manner as in Example 4 except that 0.51 part by weight of the linear organohydrogenpolysiloxane (B1) and 75 parts by weight of the silica particles (C-1) were filled, a silicone rubber system A curable composition was prepared.

[Examples 8 to 23]
After kneading vinyl group-containing linear organopolysiloxane (A1), vinyl group-containing linear organopolysiloxane (A2), silane coupling agent (D-1), and water (F), silica particles (C -1) was added. The coupling reaction was carried out by kneading for 1 hour under a condition of 60 to 90 ° C. in a nitrogen atmosphere. Next, the by-product (ammonia) was removed by kneading under a reduced pressure atmosphere at 160 to 180 ° C. for 2 hours to obtain a kneaded product (silicone rubber compound). The obtained kneaded material was cooled to room temperature. A linear organohydrogenpolysiloxane (B1) and / or a branched organohydrogenpolysiloxane (B2) and a platinum compound (E) are added to a kneaded product cooled to room temperature, and kneaded with a roll to form silicone. A rubber-based curable composition was obtained.

Vinyl group-containing linear organopolysiloxane (A1), vinyl group-containing linear organopolysiloxane (A2), linear organohydrogenpolysiloxane (B1), branched organohydrogenpolysiloxane (B2), silica The contents of particles (C-1), silane coupling agent (D-1), platinum compound (E) and water (F) were as shown in Table 2 below. The content of silica particles (C-1) in Examples 8 to 23 was 25.7% by weight. As the linear organohydrogenpolysiloxane (B1) and the branched organohydrogenpolysiloxane (B2), those shown in Table 1 above were used. “Si—H / vinyl” shown in Table 2 shows the addition amount (mmol) of organohydrogenpolysiloxane (B), which is a hydride crosslinking agent, and vinyl group-containing linear organopolysiloxane (A) (high vinyl and It was calculated by the following formula using (total with low vinyl) (mmol).
Si-H / vinyl = [organohydrogenpolysiloxane (B) (mmol)] / [vinyl group-containing linear organopolysiloxane (A) (mmol)]

[Comparative Example 1]
First, a kneaded product (silicone rubber compound) was obtained by adding 33 parts by weight of silica particles (C-1) to 100 parts by weight of a vinyl group-containing linear organopolysiloxane (A1).

  The kneading after the addition of the silica particles (C-1) was carried out by kneading for 15 minutes at room temperature (27 ° C.). Further, the obtained kneaded product was cooled to room temperature.

  Next, after adding 2.0 parts by weight of the linear organohydrogenpolysiloxane (B1) and 0.05 part by weight of the platinum compound (E) to this kneaded product, the silicone rubber is kneaded with a roll. A system curable composition was obtained.

[Comparative Example 2]
A silicone rubber-based curable composition was prepared in the same manner as in Comparative Example 1 except that 33 parts by weight of silica particles (C-2) was filled.

3. Evaluation The obtained silicone rubber-based curable compositions of Examples and Comparative Examples were evaluated by the following methods.

3-1. Evaluation of Tensile Strength, Strain, Tear Strength and Stroke The silicone rubber-based curable composition of each Example and each Comparative Example was pressed at 170 ° C. and 10 MPa for 10 minutes to be molded into a 1 mm sheet and primary cured. did. Subsequently, it was heated at 200 ° C. for 4 hours and secondarily cured.

  Then, using the obtained sheet-like silicone rubber, a dumbbell-shaped No. 3 test piece and a crescent-type test piece according to JIS K 6252 (2007) are prepared in accordance with JIS K 6251 (2004). Then, the tensile strength and strain of the dumbbell-shaped No. 3 test piece according to JIS K 6251 (2004), and the tear strength and stroke of the crescent-type test piece according to JIS K 6252 (2007) were measured.

  However, the thickness of the test piece used for measurement of tensile strength, strain, tear strength, and stroke was 1 mm.

3-2. Evaluation of Hardness For each of the silicone rubber-based curable compositions of each Example and each Comparative Example, a sheet-like silicone rubber was prepared in the same manner as the tensile strength, strain, tear strength, and stroke, and conformed to JIS K 6253 (2006). Then, type A durometer hardness was measured. The thickness of the test piece was 6 mm or more by laminating 1 mm sheets.

  The evaluation results in the silicone rubber-based curable compositions of Examples and Comparative Examples obtained as described above are shown in Table 2 above.

  As shown in Table 2, in Comparative Example 1, a certain degree of strength increase was observed by filling the silica particles (C) as the filler, but the tensile strength was not sufficient. In order to improve the tensile strength, by increasing the filler filling amount or the specific surface area of the filler, the interface between the silica particles and the rubber matrix increases, and an increase in the reinforcing effect by the filler can be expected. Then, aggregation of fillers was strong and it was difficult to fill more than this amount.

  In Comparative Example 2 in which the specific surface area of the filler is increased, the reinforcing effect is increased and the tensile strength is improved as compared with Comparative Example 1, but the filler surface remains hydrophilic, so that the silicone rubber-based curability is increased. When the silicone rubber obtained by curing the composition was deformed into a matrix, the slipping property of silica particles in the matrix was poor, and the tear strength was particularly lowered.

  On the other hand, in the Example containing a silane coupling agent, since the filler surface is hydrophobic compared with the comparative example which does not contain a silane coupling agent (D), between silica particles (C). The cohesive force decreased, and as a result, it was possible to increase the filler filling amount or increase the specific surface area of the filler. Furthermore, since the filler surface is hydrophobic, when the silicone rubber matrix is deformed, the slipping property of the silica particles in the matrix is also improved. It was possible to improve both the mechanical strength of the tear strength.

  The details of the mechanism for improving the tear strength are considered as follows. By improving the dispersibility of the silica particles, the interface between the silica particles and the rubber matrix increases, and the number of rubber molecular chains affected by the silica particles increases. Thereby, the reinforcement effect by a silica particle increases and mechanical strength improves. The rubber molecular chain subjected to the action of the silica particles has a lower molecular mobility due to the interaction with the silica particles, and has a harder structure than a portion having a high molecular mobility. In the tearing behavior of silicone rubber, if a tearing stress is applied to a hard structure when an initial crack grows and propagates, it acts as a drag, resulting in an increase in tearing strength.

  As shown in Table 2, the silicone rubber curable compositions of Examples 4 and 8 to 23 have a JIS K 6253 (2006) type A durometer hardness of less than 40.0, and JIS K 6252 ( 2007) A silicone rubber having a notched crescent tear strength of 40.0 N / mm or more was obtained. In contrast, the silicone rubbers obtained from the silicone rubber-based curable compositions of Comparative Examples 1 and 2 had a tear strength of less than 40.0 N / mm.

  Moreover, since the base material 2 is comprised using the silicone rubber which has high tear strength as mentioned above, the biocompatible sensor device (wearable sensor device) 1 excellent in a mounting feeling and durability is comprised. Can do. That is, if the base material 2 (especially its outer periphery) is thinned in order to improve the wearing feeling, a large stress is applied to the base material 2 (biocompatible sensor device 1) when it is applied to the skin or removed. Since normal PDMS (dimethylpolysiloxane) is torn from a thin portion, when normal PDMS is used, the entire substrate 2 must be thickened. As a result, when ordinary PDMS is used, the wearing feeling of the biocompatible sensor device is likely to deteriorate, and peeling due to the stepped portion (the thickness of the base material 2) is likely to occur. On the other hand, when the silicone rubber having the high tear strength as described above is used for the base material 2, the periphery of the base material 2, particularly the base material 2 can be thinned, and the wearing feeling and the durability are remarkably improved. be able to.

  The present disclosure is useful for a wearable sensor device that can be attached to a living body such as a human body or a structure such as a machine.

1 Biocompatible sensor device (wearable sensor device)
2 Base material 3b 3-axis acceleration sensor (electronic component, biosensor)
3c Temperature sensor (electronic component)
3d barometric pressure sensor (electronic parts)
3e ECG sensor (electronic parts, biological sensor)
4b Socket (electronic component)
4c Battery (electronic component)
5b RFIC (electronic components)
5c CPU (electronic parts)
5d antenna (electronic component)
5e Quartz crystal for watch (electronic parts)
6a, 6b wiring

Claims (7)

A base material having elasticity,
Two or more electronic components provided on the substrate;
A wearable sensor device that has elasticity and includes wiring that connects the two or more electronic components.   The wearable sensor device according to claim 1, wherein the two or more electronic components include a sensor that acquires predetermined information.   The wearable sensor device according to claim 2, wherein the sensor includes a biological sensor that acquires information related to a biological body.   The wearable sensor device according to any one of claims 1 to 3, wherein silicone rubber is used for the base material.   The wearable sensor device according to claim 4, wherein the silicone rubber has a tear strength of 40 N / mm or more.   The wearable sensor device according to any one of claims 1 to 5, wherein a composite of silicone rubber and a conductive material is used for the wiring.   Contains vinyl group-containing linear organopolysiloxane (A), organohydrogenpolysiloxane (B), silica particles (C), silane coupling agent (D), and platinum or platinum compound (E) A silicone rubber-based curable composition for use in the production of the wearable sensor device according to any one of claims 1 to 6.

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